Features: Experience smooth hand massage and finger exercise with this ABS roller featuring steel ball, designed to relieve tension and improve flexible without causing fatigue. Portable hand exerciser combines durability ABS construction with precise steel bearings for quiet operate not requiring power sources. Ideal for office workers, musicians, and frequent travelers seeking compact solution for hand muscle relaxation during extended computer use or travel. Use discreetly in quiet environments like offices or libraries thanks to noise reducing rollers that deliver therapeutic pressure without disturbing others. Ergonomic design promotes daily finger flexibility training while combating stiffness caused by repetitive motions, backed by easy clean materials for lasting hygiene. Specifications: Component: ABS+Steel Beads Size: Approx.9.2x4.50CM/3.62x1.77inch 3Option Color; Suitable for daily hand massage and exercise, help relieve hand fatigue and promote blood circulations, suitable for office people, home users and people who need hand rehabilitation training. Package Includes: 1pc Finger Massager note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.